I have quite a big grammar now, and basically I have multiple grammars separated into many files and at the root grammar I have many alternations like the following: Root = GrammarA | GrammarB ... | GrammarZ It looks like, the compiler complaining about the size of the inline code. Here is the error message from the compiler: "boost\spirit\core\non_terminal\impl\rule.ipp(173) : error C1128: number of sections exceeded object file format limit : compile with /bigobj" What is the solution to this issue? If I move the grammar definition to .cpp files will it help? Thanks HTan _________________________________________________________________ Windows 7: Unclutter your desktop. http://go.microsoft.com/?linkid=9690331&ocid=PID24727::T:WLMTAGL:ON:WL:en-US:WWL_WIN_evergreen:112009